how many kilowatts does a 20 horsepower motor use in 1 hour?

Answer 1

One horespower = .746kw; however, it does not make sense to talk about kilowatts used in one hour, since watts are a measure of energy per unit time. 1 watt = 1 joule per second. A 20 horespower motor uses 20 horsepower in 1 sec, 10, 1 hour, or 1 year. What this motor uses in 1 hour is 14921 watt * 3600 seconds = 53,715,600 joules.

Answer 2

Well, you've asked an incorrect question because of the mixed units! A kilowatt is a unit of power and horsepower is a unit of power.

So a correct question is: "How many kilowatts does a 20 horsepower motor produce?"

Answer: 20 HP = 20*0.750 = 15 kW

Notice that I said "produce" and you asked "use." A 20 HP motor will use 15 kW of electricity IF the motor is actually outputting 20 HP of mechanical power AND it is 100% efficient. (Not likely.)

Of course your mileage will vary (ha!).

Back to the units issue: If the motor is USING 15 kW of electricity for 1 hour, it will have used 15 kW-hours energy.

Answer 3

14.9 Kilowatts

Answer 4

i don't know '_'